Carver 356 RPM issues

[cpoint]

km, not sure. how do I check Smartcraft capable? I did not see any reference on any documentation, etc.

[g36]

Smartcraft is a mercruiser engines product.

[bud37]

I am willing to hazard a guess here and say his engine controllers are Delphi MEFI 3, no bus to helm. Merc didn't go to their own 555 ecu till maybe around 02/03.

[km1125]

I know it's in the very early 2000's, but not sure on the specific year they made them capable. I thought all their product line was capable after 2002, but some were before that.

In any case, tachs themselves are pretty inexpensive, so finding ones that look good (or that match what you want to upgrade the other to) might be the hardest part.

[km1125]

Source of the post Smartcraft is a mercruiser engines product.

I thought he did have Mercruisers in the boat?

However, checking the Smartcraft sites, it seems like his 2000 is just a tad too old to have it:

"The SmartCraft line of products are applicable to all Mercury/Mariner OptiMax outboard engines starting with Model 2000, and all MerCruiser 8.1 liter engines for Model Year 2001."

[tomschauer]

I had a 2005 Crownline with merc 5.7 magnums, and the ecms were not smart craft capable. I think it was an option for most engines until 20XX?

[cpoint]

Yeah not sure, I am at a loss on this one. Here is a picture of port engine for what it's worth.

[tomschauer]

They aren't smartcraft engines.
Close to the same as mine, but mine are blue water horizons (freshwater cooled). I would replace the tachs until you get the engines running correctly.
I would definitely verify the fuel pressure is correct. These have a mercury "cool fuel" set up with the fuel pump and regulator in a box under the engine that is water cooled. The regulators fail more often than the pumps. They sometimes fail to high pressure, making you engines run very rich (smell like gas) this will also damage the injectors.

[tomschauer]

Hey, I almost forgot...
There is a very fine fuel filter in the cool fuel box. It could be that simple!!!!

[cpoint]

Source of the post Hey, I almost forgot...
There is a very fine fuel filter in the cool fuel box. It could be that simple!!!!

tom, do you mean this tiny filter? if so that did have some stuff in it. he thought he would clean and hope also, but did not help.